Lock for elevator-cables



(No Model.)

W. S. MORTON.

LOOK FOR ELEVATOR GABLES.

Patented Jan. 18, 1887.

N. PEHIRS. vhnmumn m her. Wuni gm D. I.

. substantially the same manner and by the same NITED TATES "VALIER.SCOTT MORTON, OF ST. PAUL, MINNESOTA.

LOCK FQR ELEVATOR-CABLES.

SPECIFICATION forming part of Letters Patent No. 356,149, dated January18, 1897.

Application filed June .22, 1886. Serial No. 205,940. (No model.)

To all wh0mit may c0ncern:

Be it known that I, WALTER SooTT MOR- TON, a citizen of the UnitedStates, residing at St. Paul, in the county of Ramsey and State ofMinnesota, have invented certain new and useful Improvements in ElevatorShifting or Stopping Gable Locks, of which the following is aspecification.

, This invention relates more particularly to that class of elevatorsused for elevating freight in mercantile and manufacturing buildings,and for similar uses; and it consists in the construction and mode ofoperation of a device whereby the shifting-cable or the stoppingrope maybe locked to hold the elevator-platform at anydesired point, ashereinafter shown and described, and specifically pointed out in theclaim.

Ihave shown in the drawings several modifications of my invention, butall operating in means, and producing the same effects.

Figure 1 represents a side view with the gripping-jaw open. Fig. 2represents a side view with the gripping-jaw closed. Fig. 3 representsan edge view with the parts in the same position as'in Fig. 2. Figs. 4,5, and 6 represent a modification in the construction of the device,Figs. at and 5 being plan views showing the gripping-jaws in differentposi-' tions, and Fig. 6 being a side view. Fig. 7 is a perspective viewof the base-plate with the stationary gripping-jaw and ears for the campivot. Fig. 8 is a perspective view of the cam-lever for operating themovable jaw, and Fig. 9 is a perspective view of the movablegripping-jaw as shown in Figs. 4, 5, and 6. Fig. 10 is a side view withthe gripping-jaw closed. Fig. 11 is a side view with the grippin'g jawopen. Fig. 12is' a plan view of Fig. 10, and Fig. 13 is a side view ofFig. 10, these four last figures illustrating another slightmodification of the device. Fig. 14 is a plan view, and Fig. 15 is afront View, of the modifications shown in Figs. 10, 11, 12, andl3,illustrating another method of arranging the operating cam-lever.Fig. 16 isaperspective view of the base-frame of the modificationshownin Fig. 14. Fig. 17 is a plan View, and Fig. 18 is a sectional sideelevation, of a portion of one of the hatchways and elevator-platformswith myimprovement shown attachedthcreto, on a reduced scale.

This device will be preferably attached to the platform A of theelevator opposite the shifting-cable B; but one of the devices may beattached at each floor or other part of the building, if required.

In Figs. 17 and 18 I have shown views of one elevator-platform, A, andits supporting: frame A and'adapted to be run up and down between theguides A by the hoisting-cable A.

A represents one of the floors of the building, and B the cable by whichthe hoisting machinery is thrown in and out of gear, and technicallycalled the shifting rope or shift-ing-cable, and sometimes theshipping-cable. For clearness and definiteness I have alluded to thisrope or cable as the shifting-cable." This shifting cable runs from thehoisting machinery up and down through the hatchways, alongside of ornear the platform A, so as to be convenient to the hand of the operator.

I It frequently happens -in using freight-ole vators that the operatorhas a load of miscellaneous goods to take on or off the platform, I

and requires some time tomove them; hence it is very essential that theelevator shall not be moved until he has had time to discharge it orload it; and the object of my invention is to lock the shifting-cable,so that the operator can have complete control of the platform as longas he requires it.

My invention consists, principally, of abaseplate, a, with a fixed jaw,I), attached to the platform A of the elevator, and having a lever, (1',pivoted to it, said pivoted lever having ajaw, d", and adapted to bemoved away from and toward the fixedjaw b (by a'cam-lever, 0, alsopivoted to the base-frame a) to grip the shifting-cable between the twojaws.

I have shown several modifications of the construction of the base-leverand cam.

In Figs. 1, 2, and 3 the cam-lever e is pivoted to the base a betweenits jaw b and the pivot 01 of the lever d, and in Figs. 10, ll, 12, 13,14, and 15 the pivot 01 of the lever d is placed between the cam-lever eand the jaw b ICO bifurcations d" (l of the lever d, so that when r theouter point, e, of the lever is thrown from side to side by the foot ofthe operator the jaws b (1 will be opened or closed.

The normal position of the device will be with its jaws open, as in.Figs. 1, 11, and 5, and when it is to be operated the shifting-cable Bis drawn in toward the platform until it is 'between thejaws b d, andthe lever d is then thrown over and pressed down by the foot of theoperator, thus firmly clamping the cable B between thejawsI as in Figs.2 and 18, and locking the cable, so that it cannot bedrawn upward ordownward to ship the hoisting machinery.

The two parts d d of the bifurcatedlever d are shown of unequalthickness, the larger part, (1*, being on the side on which the greateststrains occur, while the other part, d being only 'used to open thejaws, is subjected to a very slight strain, and is consequently muchsmaller.

'In Figs. 14 and 15 the cam-lever e is shown set at right angles to thelever d and baseplate a, so that the base-plate may be attached to theupper surface or floor of the platform, with itsjaws b d projecting overthe edge of the platform, and in a position to receive the cable B. Y 1

It sometimes happens that it is not convenient to attach the base-plateupon the edge of the platform A, as in Figs. 1 and 10, and by formingthe base-plate with a slot, 9, (see Fig. 16,) the cam lever 6 may bepivoted therein, between the bifurcations 11 d at right angles to thebase-plate, the action being precisely the same on the lever as in theother arrangements. By forming the base-plate a with the. slot 9 thelever e may be set in either one of the positions indicated. The slot 9will also be formed in the base-plate (1, (shown in Figs. 1, 2, 10,11,-) but does not appear, as it is covered by the cam-lever e.

In Figs. 1, 2, .3, 10, 11, 12, 14c, 15, and 16 each of the jaws b d isshown with two sets of cavities to receive the cable, or soarranged thatthey will partially inclasp the cable, as in Figs. 2 and 3. They areattached to the platform A on its edge, as in Figs. 1, 2, 3, 10, 11, 12,and 13, or on its upperv surface, as in Figs. 14 and 15. Thus one set ofthe different parts of the device may be used to do duty for the twomodes of attachment to the platform A.

In Figs. 4, 5, 6, 7, 8, and 9 on the lever d is shown a plate or hood,d, projecting over and forming a protection to prevent foreign mattergetting in between the lever d and jaw 5, although this hood is not anessential feature of the invention. A stud, h, is shown in Fig. 7 castupon the base-plate a at the point where the lever d is pivoted, and thelever cl is shown with a cavity, h (see Fig. 9,) adapted to fit overthis stud, the pivotal bolt or pin d" being tapped or set down into orthrough the lever and stud. By this means the principal strains of thelever d are borne by the stud h, and not by the pivot-pin d These studsh may also be used in the modification shown in the other figures of thedrawings; but the illustration shown in Figs. 7 and 9 is sufficient toexplain this feature of the invention. The cam-lever e in Figs. 4, 5, 6,and 8 is shown with a rib, e, adapted to fit between the bifurcationsd"d of the lever d, as shown, the main face of the cam e acting on thelarge part d" of the lever to for'ce,the jaw d over against the jaw bwhen the lever is thrown over, as shown in Fig. 4, and the rib ecatching upon'the smaller part (1 and carrying the lever (1 over with itand opening the jaws 1! (1 when the cam-lever e is thrown over in theposition shown in Figs. 5 and 6. The movement of the lever d is thusmade positive in both opening and closing, and avoids the necessity forsprings or other similar means for opening the jaws.

While the construction, mode of operation, functions, and resultsproduced by the different parts when arranged in the different positionsshown are substantially the same, I prefer the form shown in Figs. 1, 2,and 3, as in this arrangement the camlever e and gripping-lever d can beso constructed that their centers of gravity will cause them to retainthe positions shown in Fig. 1, or with thejaws open, so that the jawswill not be liable to be accidentally locked.

I am aware that devices carried by an elevator for the purpose oflocking, when desired, the shifting-cable have hitherto been devised,and therefore I make no claim to cover, broadly, such a device. I

Having thus described my invention, what I claim as new is In ashiftingcable lock for elevators, the combination of a base-framesecured to the elevator, a fixed jaw carried thereby, a bifurcated leverpivoted to the base-frame and carrying a movable jaw which co-operateswith said fixed jaw to lock and release the shiftingcable, and acam-lever pivoted to said baseframe and adapted to operate the movablejaw of the bifurcated lever, substantially as set forth.

Intestimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WALTER SCOTT MORTON.

Witnesses:

I H. S. WEBsTER, H. CAMPBELL.

ICC

